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Oxygen vacancy engineering of Bi2O3/Bi2O2CO3 heterojunctions: Implications of the interfacial charge transfer, NO adsorption and removal
Lu, Yanfeng1,2,3; Huang, Yu1,3; Zhang, Yufei1,3; Cao, Jun-ji1,3; Li, Haiwei4; Bian, Cheng3; Lee, Shun Cheng4
2018-09-05
发表期刊APPLIED CATALYSIS B-ENVIRONMENTAL
卷号231期号:9页码:357-367
文章类型Article
摘要Efficient enrichment of targeted gaseous pollutants and fast diffusion rates of charge carriers are essential for the photocatalytic removal of nitric oxides at ambient concentration levels. Here we demonstrate that the construction of nano-structured Bi2O3/Bi2O2CO3 heterojunctions with oxygen vacancies, increasing the photocatalytic NO removal activity, durability and selectivity for final products nitrate formation. Combining the experimental and density-functional theory calculations, it was elucidated that the presence of surface oxygen vacancies not only work as adsorption sites of low concentration NO, but also offer an intimate and integrated structure between surface defects and the light-harvesting heterojunctions, which can facilitate solar energy conversion and charge carrier transfer (more than 2 times). Control experiments with pristine Bi2O3/Bi2O2CO3 also confirmed the crucial role of surface oxygen vacancies on the improvement of NO adsorption and removal ability during the photocatalytic degradation process. We explain the enhanced removal of NO through the synergistic effect of oxygen vacancy and heterojunction, which not only guaranteed the generation of more center dot OH radicals, but also provided another route to produce hydrogen peroxide. Our findings may provide an opportunity to develop a promising catalyst for air pollution control.
关键词Oxygen Vacancy Bi2o3/bi2o2co3 Heterojunction Photocatalysis Charge Separation No Enrichment And Removal
WOS标题词Science & Technology ; Physical Sciences ; Technology
DOI10.1016/j.apcatb.2018.01.008
关键词[WOS]VISIBLE-LIGHT IRRADIATION ; AUGMENTED-WAVE METHOD ; PHOTOCATALYTIC ACTIVITY ; NITRIC-OXIDE ; 001 FACETS ; ENVIRONMENTAL REMEDIATION ; PERFORMANCE ENHANCEMENT ; CO OXIDATION ; EFFICIENT ; DEGRADATION
收录类别SCI
语种英语
WOS研究方向Chemistry ; Engineering
WOS类目Chemistry, Physical ; Engineering, Environmental ; Engineering, Chemical
WOS记录号WOS:000430762300036
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5167
专题粉尘与环境研究室
作者单位1.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol SKLLQG, Inst Earth Environm, Xian 710061, Shaanxi, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Key Lab Aerosol Chem & Phys, Inst Earth Environm, Xian 710061, Shaanxi, Peoples R China
4.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Hong Kong, Peoples R China
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Lu, Yanfeng,Huang, Yu,Zhang, Yufei,et al. Oxygen vacancy engineering of Bi2O3/Bi2O2CO3 heterojunctions: Implications of the interfacial charge transfer, NO adsorption and removal[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2018,231(9):357-367.
APA Lu, Yanfeng.,Huang, Yu.,Zhang, Yufei.,Cao, Jun-ji.,Li, Haiwei.,...&Lee, Shun Cheng.(2018).Oxygen vacancy engineering of Bi2O3/Bi2O2CO3 heterojunctions: Implications of the interfacial charge transfer, NO adsorption and removal.APPLIED CATALYSIS B-ENVIRONMENTAL,231(9),357-367.
MLA Lu, Yanfeng,et al."Oxygen vacancy engineering of Bi2O3/Bi2O2CO3 heterojunctions: Implications of the interfacial charge transfer, NO adsorption and removal".APPLIED CATALYSIS B-ENVIRONMENTAL 231.9(2018):357-367.
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